George e



(No Model.)

G. B. SMITH & 0.. H. WILKIE. ORE STAMP.

Patented Dec. 24, 1889.

Q/Z 'm-X WITNESSES:

ATTORNEY is a full, clear, and exact description.

UNITED STATES GEORGE E. SMITH, OF COONEY, AND

. TERRITORY O ORE- CHARLES H. WILKIE, OF SILVER CITY, F

NEW MEXICO. A

STAMP.

SPECIFICATION forming part of Letters Patent No. 417,965, dated December24, 1889.

Application filed April 9, 1889 To all whom it may concern.-

Be it known that we, GEORGE E. SMITH, of Cooney, in the county ofSocorro and Territory of New Mexico, and CHARLES H. VILKIE, of SilverCity, in the county of Grant and Territory of New Mexico, have inventeda new and useful Ore-Stamp, of which the following Our improvementrelates to an attachmen to the stamps of quartz-mill batteries, and hasfor its object to provide a simple and dur. ble device, capable ofcommunicating a positive rotary motion to the stamp-stem during theentire drop, whereby the capacity of the battery is greatly increased.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter more fully set forth, and pointedout in the claims.

Reference is to behad to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a central vertical section through the device. Fig. 2 is alongitudinal section on line or 00 of Fig. 1. Fig. 3 is a side elevationofone section of the cylindrical portion of the attachment. Fig. 4 is anend view of the cross-head. Fig. 5 is a side elevation of the pivotalbolt for the dies or grips adapted for attachment to the cr0ss-head, andFig. 6 illustrates the application of the attachment to a battery.

In carrying out the invention the cylinder 10 is secured upon theguide-rail 11, which cylinder is provided in the bottom with an aperture12, aligning a corresponding aperture 13 in the guide-rail, as bestillustrated in Fig. 1. Through the apertures 12 and 13 the stamp-stem14: is carried upward to slide in the said apertures and through thesaid cylinder. The cylinder 10 is preferably constructed in two sectionsprovided with apertured ears 15, whereby said sections may-beexpeditiously and securely united through the medium of suitable bolts.The cylinder is preferably thus made in sections to facilitate itsapplication to the stamp-stems already set up in the battery. Inopposite sides of the cylinder, or in each section of the cylinder, aspiral groove 16 is produced, ex-

Serial No. 306,516. (No model.)

the stamp-stem passes, and a diagonal end lug or projection 19, ofsufficientwidth and suitable contour to freely slide in the respectivegrooves 16. In the upper face of the cross-head 17 arecess 20 isproduced, and

in each end of said recess a die or grip-arm 21 is pivoted, the opposedends of which arms are concaved, as illustrated at a in Fig. 2, wherebythe said ends are adapted to the cylindrical contour of the stamp-stem,one die or grip-arm being purposed to engage said stem upon oppositesides, as best illustrated in Figs. 1 and 2.

The dies or grip-arms 21 are pivoted within thecross-head 17 through themedium of a tapering bolt 22, illustrated in Fig. 5, and shown inposition in Fig. 2, the object of the tapering bolt being to provide ameans whereby the dies or grip-arms may be adjusted to properly engagewith stamp-stems of various diameters. Below the cross-head 17 thestampstem is provided with a collar 23, secured thereto, preferably bymeans of a suitable set-screw, which collar by being adjusted up or downupon the stamp-stem will limit the revolution of the stem in its dropmotion.

The cylinders 10, constructed as herein set forth, and provided with thecross-head, as described, are made to surround the respectivestamp-stems, as shown in Fig. 6, and are held in position by attachmentto the binder 11, said attachment being ordinarily effected through themedium of lagscrews or their equivalent.

It will be readily observed that in operation, when the stampstems arecarriedvupward, the dies or grip-arms will not bind upon the said stem,whereby the stem as it is carried upward is not necessarily revolved. Asthe stem travels upward the attached collar 23 carries the cross-headalso upward in the direction of the top of the cylinder. Upon the dropmotion of the stamp-stem the dies or grip-arms positively clutch thestem, and by reason of the extremities of the said crosshead travelingin the spiral grooves 16 a decided positive rotary motion iscommunicated to the stem during its entire drop.

Our invention, as above stated, gives a positive revolving or rotarymotion during the entire drop, the weight of the stamp, less the slightvfriction of the cross-head in the cylinder, being the source of power.

It is a well-known fact that a rotary motion with the falling stampfacilitates the crushing of ore.

In addition to the collar 23 being used to regulate the rotation of thestamp-stem, it

with a stamp-stem and a cylinder surroundmay also be employed tocompensate, by means of adjustment, forthe wear of the shoes and thedies. In applying the attachment to batteries already erected, sincethere is room for only three cylinders upon the upper binder, we placetwo on the top of the mortar.

caved opposed ends capable of gripping the stamp-stem upon its dropmotion, the said stem being provided with means for raising thecross-head, substantially as and for the purpose specified.

3. In a quartz-crusher, the combination,

ing the said stem provided with spiral grooves extending from top tobottom, of a cross-head apertured to receive the stamp-stem and providedwith end lugs capable of sliding in the grooves of the cylinder, acollar adjustably secured upon the stem beneath the cross-head, and adie or griparm pivoted in the upper surface of the cross-head near eachend, by means of an adj ust-able conical bolt, said griparms providedwith a concaved outer end capable of contact with the said stamp-stem,all combined for operation substantially as shown and described. I

GEORGE E. SMITH. CHARLES II. WILKIE. Witnesses:

FRANK M. GRAHAM, FRANK J. WRIGHT.

